Questions tagged [troubleshooting]
Troubleshooting is a form of problem solving, often applied to repair failed products or processes.
265
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Lots of missing files in debsums output
I run debsums -cs in a machine running Debian Jessie. The output is lots of missing files.
Lots of them (maybe all) has some sort of locale two letters code (like zh, fr, de, and so on).
I have run ...
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1
answer
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Why does my mouse stop working a short time into my session?
Running Easy Peasy 1.6 clean installation. Hardware - EEE PC 900-HA.
About 10 or so minutes into a new session after a reboot my mouse will stop working. It will still move the pointer, but it will ...
- 133
3
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2
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Jupyter seems to connect fine, but I cannot access it in a browser
I'm trying to open Jupyter notebook in a browser. Jupyter seems to have connected just fine:
[I 20:38:02.663 NotebookApp] Serving notebooks from local directory: /home/user/.jupyter
[I 20:38:02.663 ...
- 31
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youtube-dl, how to write all subs of a youtube playlist to ONE single file?
I'm on Fedora 28 OS and have youtube-dl version 2019.03.18 and I wanted to download all the subs and only the subs of a Crashcourse playlist off of youtube, consisting of 45 videos.
I want all the ...
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Fedora 27 - Laptop won't suspend when closing lid
I am facing this rather bizarre situation. After shutting down my laptop by pushing the power button for a few seconds and powering it on again the "suspend when lid is closed" option isn't working.
...
- 435
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1
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How do I troubleshoot ssh tunnels disconnection?
I am using SSH tunnels launched via autossh at boot on a device installed at remote locations. Up to now everything was working fine but yesterday the connection partly went down and autossh wouldn't ...
- 1,069
3
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1
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415
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Slow ecryptfs mount
If I create an encrypted share (internally done via ecryptfs) on a synology disk station DS109 (DSM 4.1), mounting is very slow (approx 40 seconds).
It doesn't matter if I do it via the web-...
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3
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1
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952
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good unix troubleshooting book [closed]
I've been trying to learn *nix and I think I'm doing pretty good as far as basic commands, and I think I understand a lot of the "monitoring" type commands etc... in short, I think I'm doing okay with ...
- 31
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0
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429
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How do I interpret and troubleshoot occurances of Linux system errno?
In system administration and software development on Linux, it is very common to come across errors that come from the system C library and/or kernel, which I will call "errnos" (short for &...
- 390
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2
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Unblanking a Linux Terminal Display
I am running an Ubuntu Server that boots to the console. After a long wile, the screen goes blank and I cannot type or unblank the screen. Even the caps lock / num lock do not change states. I am ...
- 1,976
2
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3
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Troubleshoot SSH connection problem
I am looking for tips on how to troubleshoot a problem with connecting to a new server via SSH. I am trying to connect using private-key authentication, where SSH uses my local private key to ...
- 4,070
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2
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Resolving Dual-Boot Issue: Windows Not Showing in GRUB Menu
I recently encountered a dual-boot issue on my Debian 12 system where Windows 10 was not showing up in the GRUB menu after a Debian update. I spent some time troubleshooting the problem and was able ...
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Troubleshooting advice for: -bash: cannot execute binary file: Exec format error
I have a mining rig and am trying to run a program ./garlicoind but I get this error:
-bash: ./garicoind: cannot execute binary file: Exec format error
Is this a common problem? What does it ...
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2
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Investigating problematic processes
When a command or process seems to hang, freeze, crash, or whatever; is there a way to investigate exactly what it's currently doing (if anything), behind the scenes?
Would be especially useful to ...
- 1,272
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2
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How can I determine which service run during bootup is responsible for a certain behaviour?
On my Fedora 14 system, some strange bind mounts have appeared in the list of mounts. They appear on every bootup. I can unmount them with umount -l, but I would like to find which package is mounting ...
- 1,249
2
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2
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531
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Troubleshoot SSH reverse tunnel between server and Raspberry Pi
I have two systems: An Ubuntu 20.04 server on the Internet and a Raspberry Pi 2B (Ubuntu 18.04) in my local LAN (behind a NAT router). I am opening a reverse tunnel from the Raspberry Pi to the server ...
- 185
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1
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`ls -d */` is not working on one specific directory [duplicate]
ls -d */ runs fine in all other directories that I tried, but in one specifically, I get this:
ls: invalid option -- '/'
Try 'ls --help' for more information.
I pasted the command in the terminal, ...
- 3,866
2
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2
answers
878
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VirtualBox guest Win10 @ Linux host hangs big time at startup, how to troubleshoot?
I have a VirtualBox VM running Windows 10 on a Linux host. It used to work just fine, but this day when I started it it hangs big time.
The VM’s window is just a black square, and also the host hangs ...
- 1,356
2
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1
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Gnome 3 "broken" after upgrades, kind of looks like gnome 2 . . .?
I'm running debian wheezy ( testing ) and after some upgrades my gnome 3 is broken. It's not exactly broken, but it's completey different. Almost like it's no longer actually gnome 3; most of the UI ...
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1
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How should I debug a hard-lockup of my Ubuntu laptop
I've been running Ubuntu on a Thinkpad T450s for some time now.
Every so often, the system will hard-lock on me. E.g. the mouse won't move, ctrl-alt-f# won't take me to a plain terminal, etc.
I ...
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Intermittent Network disconnection, Ubuntu, troubleshooting
I purged network manager from my system (OS: Linux 3.13.0-53-generic #89-Ubuntu)
Networking service runs on my system:
sudo service networking status
networking start/running
Static interface info:...
- 123
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6
answers
275
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Difficulty setting up iptables
I'm very new to *nix operating systems, and I'm having some trouble which I believe is because of misconfiguration of the iptables firewall.
My server has SSH running on port 22, and server software ...
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1
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412
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How to Repair Grub in a Cloud VM (Azure)
I ran into some troubles doing do-release-upgrade and it killed my grub boot.
Because I couldn't find the steps on how to fix this online I'll answer with my own notes below.
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1
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Finding root cause of TigerVNC multi-minute pauses via ComCast; why "* * *"
What are some techniques for tracking down root cause(s) of intermittent, sometimes very long delays in TigerVNC sessions?
Working remotely via SSH using TigerVNC. Most of the time the screen is ...
- 123
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1
answer
3k
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WD MyCloud NFS Mount to Asus Merlin Router: NFS mount troubleshooting: "no such device"
Goal: mount a UNIX NAS (WD myCloud) to a UNIX router.
What has been done (do not assume it is correct):
Checked router is running NFS client:
ps | grep nfsd
19243 username 1376 R grep nfsd
...
- 1,384
2
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1
answer
847
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Most programs suddenly segfault
I'm having a strange occurrence on my Raspbian Raspberry Pi, as most programs are now segfaulting before they even start:
user@raspberrypi:~ $ sudo -s
Segmentation fault
user@raspberrypi:~ $ ssh -vvv ...
- 123
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votes
1
answer
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Can I do reverse traceroute?
Is it possible to do reverse traceroute ?
This is very important for me to know, Why the websites are loading slow for my clients in certain area ?
I have explained my problem here: (why i need ...
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2
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330
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USB 3G dongle Internet keeps failing on a laptop with Fedora 20
I use a 3G dongle for Internet in my summerhouse. It has worked fine all summer, but since yesterday it has been losing connection, or something and I have to unplug it and insert it again for the ...
- 5,851
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1
answer
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How to know what is trashing my Linux mint system?
My linux system is trashing occassionally. I have 4 GB of ram which is good even for Windows 8. All in all I have good specs. But occasionally the HDD light in the CPU is on for a long time and at the ...
- 1,228
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4
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Is there a way to circumvent normal installation proceedures and manually install (M1400 Motion Computing Tablet)
TLDR version
Can I install Linux by booting the Live CD and then doing a dd if=/ of=/dev/hda?
Can I somehow install Linux by copying files off of the installing ISO directly onto the harddisk drive?
...
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1
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How might I detect memory errors if I do not have root or physical access to a Linux system?
The background to my question is as follows. I currently rent a virtual private server from a major hosting company, which I use to run a minecraft server. I have a suspicion that there may be bad ...
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1
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How to troubleshoot a network adapter on an AIX 4.3.3 machine
I'm trying to brush up my skills on AIX. I have an ancient RS/6000 43P-133, which I'm trying to resurrect before investing in anything more sophisticated. I used to do automation and scripting on AIX ...
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1
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Colors become distorted randomly in Linux, not in Windows
Currently running Fedora, but my issue is not exclusively pointed to this distribution!
I have been experiencing this issue of my screen colors inverting/distorting from time to time. And this bug is ...
2
votes
1
answer
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Debugging tactic -- how to know which process is attempting to modify a file?
I have a strange bug where one of the many development tools I'm using is issuing a git reset HEAD in my project, causing me to lose all my work. I'm able to confirm this by checking the git reflog.
I ...
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1
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602
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When creating a LiveUSB, write to the partition (/dev/sdb1) or to the device (/dev/sdb)?
How should I write the img or iso to a pen drive?
I'm trying several combinations, but fail to boot and I'm not sure the problem is in the writing to the pen drive, so I want to discard this ...
- 3,866
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1
answer
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Network interface issue after upgrading CentOS 6 to 7
Recently I have upgraded my VM Server from CentOS 6 to 7. The upgrade completed without any error but the network interface is not showing in ifconfig and there is no file called ifcfg-eth0.
Before ...
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2
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sendmail attachment is empty
I am trying to include an attachment to my sendmail eml file.
The current eml file (order.eml) has the following contents
From: Sender <[email protected]>
To: [email protected]
Subject: Report
...
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1
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How to boot Chromium OS verbosely?
I'm attempting to boot the latest Chromium OS 32-bit build from this site.
Whilst I'm currently experiencing a typical installation issue (stuck at a black screen after initial loading screen), not ...
- 2,137
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1
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Problem with java3d
I want to play this java simulation: http://www.compadre.org/OSP/items/detail.cfm?ID=9640 in java 3d mode on a linux (ubuntu) system. But it doesn't work.
If I switch to java 3d-mode it complains ...
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1
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can't open netbeans IDE in Fedora 17
my linux version is: Fedora 17
I installed Netbeans IDE 7.1.2 and it was working fine, but now, when I try to open it, nothing happens after double clicking on it.
I think updating the kernel may be ...
- 1,257
2
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1
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665
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Missing entries from messages file
I have a CentOS server that has been working well until recently. The virtualized instance of the server encountered some type of issue earlier today and required it to be hard rebooted in order for ...
- 941
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0
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Error mounting: wrong fs type, bad option, bad superblock, missing codepage or helper program, or other error
Several years ago I purchased a Synology NAS. I had it set up like so:
(NAS) ==> (1)(2)(3)(4)(empty)
After a while, I noticed that any drive I plugged into bay number [3] would fail after a couple ...
2
votes
0
answers
307
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How do I debug this issue about making xrandr permanent?
I'm trying to change my screen resolution at startup using xrandr.
Following this answer, I symlinked a script as /etc/X11/Xsession.d/45setoutput. Here's the content of script:
#!/usr/bin/env bash
...
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votes
2
answers
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Virtualbox Linux Mint boot black screen with blinking line
I'm trying to install Linux Mint (Cinnamon) in VirtualBox. I have set up the machine and .iso, but when it boots it just shows a black screen with a blinking horizontal line. I had a similar issue ...
2
votes
0
answers
837
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Cursor moving to the upper right corner
My dad bought a Lenovo Erazer X510 desktop system a little over a year ago. It is Intel based, and has an Nvidia graphics card. Not that it matters because the fault comes even on the integrated Intel....
- 21
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0
answers
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Bookmarks' suggestions are too slow in Firefox
After re-installing Firefox on my Linux Mint system I have been experiencing some trouble with my bookmarks; namely, when I start typing in the URL bar (the main bar in Firefox, the one on the left ...
- 1,069
2
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0
answers
239
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How to move a folder if I can't log in to my ubuntu?
My Ubuntu was working great but, I was having problems with a file that I thought was not in the right location, so I decided to move a folder called boot into a folder called root, and when I ...
2
votes
0
answers
1k
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Linux Mint 18 can't connect to any wifi network
I have recent issues with WIFI not working on my fresh Mint installation.
When trying to connect to my home WIFI it asks me again for password after 2sec and then again after 5sec to finally drop ...
- 141
2
votes
1
answer
113
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Reinstall Debian, keep conf and programs [closed]
I am having trouble to login on the GUi (gdm3). I can login in a prompt in this machine and connect to the internet (it's a fast connection).
Could I just run a command and reinstall the system and ...
2
votes
0
answers
148
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How to determine what event is disabling Sticky Keys?
I have an ongoing problem with Kubuntu 14.10, when using the computer I find that Sticky Keys is suddenly disabled. I reenable the feature, but in after some time (measured as three minutes to days) ...
- 15.9k